物理化学学报 >> 2009, Vol. 25 >> Issue (08): 1641-1644.doi: 10.3866/PKU.WHXB20090812

研究论文 上一篇    下一篇

时间分辨傅立叶变换红外发射光谱技术研究叔丁基亚硝酸酯的光解动力学

计敏, 甄军锋, 张群, 陈旸   

  1. 合肥微尺度物质科学国家实验室, 中国科学技术大学化学物理系, 合肥 230026
  • 收稿日期:2009-04-10 修回日期:2009-05-08 发布日期:2009-07-16
  • 通讯作者: 张群, 陈旸 E-mail:qunzh@ustc.edu.cn; yangchen@ustc.edu.cn

Photodissociation Dynamics of tert-Butyl Nitrite Investigated by Time-Resolved Fourier TransformInfrared Emission Spectroscopy

JI Min, ZHEN Jun-Feng, ZHANG Qun, CHEN Yang   

  1. Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2009-04-10 Revised:2009-05-08 Published:2009-07-16
  • Contact: ZHANG Qun, CHEN Yang E-mail:qunzh@ustc.edu.cn; yangchen@ustc.edu.cn

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摘要：

利用时间分辨傅立叶变换红外(TR-FTIR)发射光谱技术对叔丁基亚硝酸酯355 nm激光光解动力学进行研究. 通过对实验观测到的光解产物NO的时间分辨红外发射谱进行分析, 获得了NO的转动温度和相对振动布居, 并发现了振动布居的反转现象. 结合前人的工作, 我们确认了光解产物NO的最大振动布居量子数υ与光解光激发的母体分子N=O伸缩振动的泛频跃迁所涉及的振动量子数υ*之间的关系为υ=υ*-1.

关键词: 光解动力学, 时间分辨傅立叶变换红外发射光谱, 叔丁基亚硝酸酯, 振动布居

Abstract:

The photodissociation dynamics of tert-butyl nitrite at 355 nm was investigated by means of time-resolved Fourier transform infrared (TR-FTIR) emission spectroscopy. By analyzing the observed TR-FTIR emission spectra of the NO fragments, we obtained the rotational temperature and the relative vibrational distribution of NO. In addition, an inversion was found to occur within this vibrational distribution. With the aid of previous studies, we determined that the relationship between the vibrational quantum number υ of NO corresponding to its maximum vibrational distribution and the vibrational quantum numbers υ* relating to the overtone transitions of N=O stretching vibration of the parent molecule is υ=υ*-1.

Key words: Photodissociation dynamics, Time-resolved Fourier transforminfrared emission spectroscopy, tert-butyl nitrite, Vibrational distribution